add slides for more talk time

Author: liormizr

bluetooth_distance_sensor.sh

@@ -1,32 +1,45 @@
 #!/usr/bin/env bash
 
 #Global VARS:
-device=$1
+device=$1  # Bluetooth mac address
 btconnected=0
 btcurrent=-1
 counter=0
 notconnected="0"
 connected="1"
 rssi=-1
 
+#Linux applications
+#1. hcitool - Bluetooth linux driver cli app
+#             For getting RSSI readings
+#2. rfcomm  - RF communication linux cli app
+#             For connecting with mac address
 #Command loop:
 while [ 1 ]; do
+    # Trying to get RSSI signal from Bluetooth
     cmdout=$(hcitool rssi $device)
     btcurrent=$(echo $cmdout | grep -c "RSSI return value") 2> /dev/null
     rssi=$(echo $cmdout | sed -e 's/RSSI return value: //g')
+
     if [ $btcurrent = $notconnected ]; then
+        # Trying to connect to the Bluetooth mac address
         echo "Attempting connection..."
         rfcomm connect 0 $device 1 2> /dev/null >/dev/null &
         sleep 1
     fi
+
     if [ $btcurrent = $connected ]; then
+        # print to STDOUT RSSI signal
         echo "Device connected. RSSI: "$rssi
     fi
+
     if [ $btconnected -ne $btcurrent ]; then
         if [ $btcurrent -eq 0 ]; then
+            # print to STDOUT No Connection
             echo "GONE!"
         fi
         if [ $btcurrent -eq 1 ]; then
+            # print to STDOUT have Connection
             echo "HERE!"
         fi
         btconnected=$btcurrent

details.py

@@ -0,0 +1,69 @@
+import os
+from typing import Union
+from pathlib import Path
+from collections import deque
+from subprocess import run, Popen, STDOUT, PIPE
+
+UNLOCK_STATE = 'UNLOCK'
+LOCK_STATE = 'LOCK'
+SENSOR_SCRIPT_PATH = Path('bluetooth_distance_sensor.sh')
+DO_NOT_CARE_SENSOR_MESSAGES = [
+    'Read RSSI failed: Input/output error',
+    'Attempting connection...',
+    'GONE!',
+    'HERE!',
+]
+LOCKER_LOCK_COMMAND = os.getenv(
+    'LOCKER_LOCK_COMMAND',
+    'gnome-screensaver-command --lock')
+LOCKER_UNLOCK_COMMAND = os.getenv(
+    'LOCKER_UNLOCK_COMMAND',
+    'gnome-screensaver-command --deactivate')
+LOCKER_STATUS_COMMAND = os.getenv(
+    'LOCKER_STATUS_COMMAND',
+    'gnome-screensaver-command --query')
+LOCKER_UNLOCK_SCREEN_SAVE_PREFIX = os.getenv(
+    'LOCKER_UNLOCK_SCREEN_SAVE_PREFIX',
+    'The screensaver is inactive')
+
+
+def bluetooth_distance_locker(device_mac_address):
+    commend = [str(SENSOR_SCRIPT_PATH), device_mac_address]
+    queue = deque(maxlen=5)
+    state = UNLOCK_STATE
+    bluetooth_active = False
+
+    def parse_line():
+        """
+        Parse the child process line
+        * check if relevant
+        * modify the queue
+        """
+        ...
+
+    def print_state():
+        """
+        Print nice status to stdout
+        """
+        ...
+
+    def check_screen_save_status() -> Union[UNLOCK_STATE, LOCK_STATE]:
+        """
+        Check status of the screen save
+        """
+        ...
+
+    with Popen(commend,
+               stderr=STDOUT, stdout=PIPE,
+               bufsize=1, universal_newlines=True) as process:
+        for line in iter(process.stdout.readline, ''):
+            parse_line()
+            state = check_screen_save_status()
+
+            if state == UNLOCK_STATE and len(queue) == queue.maxlen:
+                state = LOCK_STATE
+                run(LOCKER_LOCK_COMMAND.split())
+            elif state == LOCK_STATE and len(queue) < 4:
+                state = UNLOCK_STATE
+                run(LOCKER_UNLOCK_COMMAND.split())
+            print_state()

story.py

@@ -363,6 +363,18 @@ def the_research_2():
     pass
 
 
+@explanation_snippets
+def bluetooth_distance_sensor():
+    """
+    How does the bluetooth distance sensor works??
+    """
+bluetooth_distance_sensor.code = (
+    'def open_sensor_in_editor():',
+    "run(['vim', 'bluetooth_distance_sensor.sh'])",
+    '',
+)
+
+
 @explanation_snippets
 def developing_1():
     """
@@ -415,13 +427,29 @@ def developing_3():
     """
 
 
+@explanation_snippets
+def finished_project():
+    """
+    How does the finished project looks like??
+    """
+finished_project.code = (
+    'def open_finished_project_in_editor():',
+    "run(['vim', 'details.py'])",
+    '',
+)
+
+
 @explanation_snippets
 def end():
     """
     Demo and questions
-
-    $ distance_locker -a <mac address>
     """
+end.code = (
+    'def demo():',
+    'with suppress(KeyboardInterrupt):',
+    "run(['distance_locker', '-a', PHONE_ADDRESS])",
+    '',
+)
 
 
 if __name__ == '__main__':